The function of air source heat pump is: an energy-saving device that can make heat flow from low-level heat source air to high-level heat source.It is a form of heat pump.As the name suggests, heat pumps, like pumps, can convert low-level heat energy that cannot be directly used (such as heat contained in air, soil and water) into high-level heat energy that can be used, so as to achieve the purpose of saving some high-level energy (such as coal, gas, oil, electricity, etc.).As the demand for cold sources is becoming more and more diversified, the functions of refrigeration and heating are often integrated in a set of equipment.It is common in cold winter and hot summer areas, but in some buildings without heating conditions in the north, air source heat pump products for coolant appear.
In winter, when the outdoor weather may be lower than -20 ℃, in order to maintain the stability of the system, a heat storage box is required. When the outdoor temperature is high, heat storage is carried out in advance. At night or when office work is required, the heat pump is supplemented to release heat energy due to the reduced heating efficiency.Fan coil units are generally used at the end, which are heated in winter and cooled in summer.The coolant in the system needs a high-low temperature switch. The high temperature can reach 60 ℃, and the local minimum temperature in winter may reach -35 ℃ when the low temperature is not used. In addition, there are many materials in the system, such as copper, iron, aluminum, PPR and so on. Therefore, the low-temperature heat pump system has high requirements for the coolant.Conventional automobile antifreeze is prone to corrosion in the process of use, and the system efficiency is seriously reduced.The coolant developed by the glacial coolant pharmaceutical chemical industry has stable performance, and the operating condition is -35~120 ℃, which is practical for low-temperature air source heat pump.
In the operation of heat pump system, the secondary pump system is generally used.It is appropriate to use the water tank of the coolant pump as a closed water tank.If it is an open water tank, under the operating condition of the heat pump in winter, the coolant evaporates quickly, and it is easy to cause the drift of the physical parameters of the coolant when the coolant is supplemented in the later stage. In summer, the low-temperature operation is easy to cause moisture absorption and the freezing point moves up. Therefore, the low-temperature coolant heat pump system needs to regularly detect the physical properties of the coolant and take protective measures. glacial coolant is provided with lifetime free testing.